CONTINENTAL INPUTS OF BERYLLIUM TO THE OCEANS
CONTINENTAL INPUTS OF BERYLLIUM TO THE OCEANS
复制标题
DOI：
10.1016/0012-821x(92)90154-n
复制
发表时间：
1992-12-01
影响因子：
5.3
通讯作者：
YIOU, F
中科院分区：
文献类型：
--
作者：
BROWN, ET;MEASURES, CI;YIOU, F
了解宇宙成因放射性同位素 Be-10 (t1/2 = 1.5 My) 和稳定同位素 Be-9 的地球化学对于开发它们在深海沉积物中作为地质年代计和宇宙成因核素产生变化监测器的用途是必要的。我们检查了受大陆物质输入强烈影响的海洋区域中的这些同位素；通过检查地中海（一个受撒哈拉尘埃强烈影响的盆地）的水柱化学来研究大气气溶胶的影响，同时通过亚马逊河和恒河-雅鲁藏布江河口的盐度横断面来研究流入海洋的河流通量。这些结果用于量化河流和风成通量；它们表明，风尘可能是海洋中 Be-9 最重要的来源。因此，海洋沉积记录中 Be-10:Be-9 的变化与放射性衰变或 Be-10 产量的变化无关，可能是由局部或区域的灰尘输入变化引起的。
An understanding of the geochemistry of the cosmogenic radioisotope Be-10 (t1/2 = 1.5 My) and the stable isotope Be-9 is necessary for the development of their use in deep-sea sediments as a geochronometer and as a monitor of variations in cosmogenic nuclide production. We examined these isotopes in oceanic regions strongly influenced by input of continental materials; the effects of atmospheric aerosols were studied through examination of the water column chemistry of the Mediterranean (a basin strongly influenced by Saharan dust) while salinity transects through the Amazon and Ganges-Brahmaputra estuaries were used to investigate riverine fluxes to the oceans. These results were used to quantify riverine and eolian fluxes; they indicate that eolian dust is probably the most significant source of Be-9 to the oceans. Changes in Be-10:Be-9 in the marine sedimentary record which are not associated with radioactive decay or variability in Be-10 production can thus result from local or regional changes in dust inputs.